CN2416136Y

CN2416136Y - Reinforced concrete manhole cover & base

Info

Publication number: CN2416136Y
Application number: CN 99243027
Authority: CN
Inventors: 张友闻
Original assignee: Individual
Current assignee: Individual
Priority date: 1999-09-15
Filing date: 1999-09-15
Publication date: 2001-01-24
Anticipated expiration: 2009-09-15

Abstract

The utility model relates to a reinforced concrete manhole cover and a manhole seat. The utility model comprises a manhole cover and a manhole seat, and is characterized in that the manhole cover (1) forms a circular tortoise shell shape; a reinforced net (5) with a lifting hook (4) is positioned at the inner lower part of a manhole cover entity; the periphery of the manhole cover (1) is provided with an edge protective plate (6); the manhole seat (2) forms a ring shape; the cross section of the manhole seat forms an 'L'shape; a framework of the manhole seat (2) is composed of a plurality of 'L'-shaped stirrups (7) and a plurality of ring-shaped reinforcements (8) which are bound with the stirrups (7). The utility model adopts the reinforced concrete structure, and has the advantages of light weight, low cost, and littlt possibility of loss, and has the advantages that a bottom seat entity is moderately enlarged and is firmly combined with a road surface for being difficultly pushed by vehicles, and the manhole cover forms the tortoise shell type structure and has the advantages of large bearing capacity, strong wear resistance, and high safety performance.

Description

Steel bar concrete well lid, well seat

The utility model relates to municipal engineering well lid well seat, particularly a kind of steel bar concrete well lid well seat.

At present, municipal engineering are the used well lid well seat overwhelming majority made by cast iron, go to sell off stolen pedestrian, the car accident of occurring frequently of well lid because interests order about usually to be stolen by stealer.Occurred various anti-stealing manhole covers in recent years, but still made, can not stop the stolen phenomenon of well lid at all with cast iron materials.In addition, conventional well seat entity is little, combines insecurely with the road surface, is often promoted displacement by vehicle and causes the accident, and the well lid crisp fritter is also easily crushed by vehicle.

The purpose of this utility model is to overcome that existing casting iron well lid well seat is easily stolen, squashy defective, and providing a kind of is steel bar concrete well lid, the well seat of major ingredient with the concrete.To satisfy the needs of municipal engineering construction.

Steel bar concrete well lid of the present utility model, well seat comprise: well lid and well seat is characterized in that: the rounded turtle shell shape of described well lid (1), and the steel mesh reinforcement (5) of band suspension hook (4) is positioned at the bottom of well lid entity, and well lid (1) periphery is provided with edge plate (6); Described well seat (2) is a ring-type, and its cross section is

Shape, the skeleton of well seat (2) is by spaced apart some

U stirrup u (7) reaches some ring-type reinforcing bars (8) formation with stirrup (7) colligation.

Description of drawings of the present utility model is as follows:

Fig. 1 is its vertical view, and Fig. 2 is its sectional view.Each several part shown in Fig. 1, Fig. 2 is: well lid (1), and well seat (2), sign (3), the steel mesh reinforcement (5) in the well lid suspension hook (4), well lid is with the safe edge steel plate (6) of steel mesh reinforcement (5) welding, well seat skeleton

U stirrup u (7) and steel hoop (8), and well seat suspension hook (9).

The rounded turtle shell shape of its well lid (1), periphery is thicker, from periphery to center attenuation gradually.When making well lid,, use concrete C by the well lid mould ₅₀Cast forms.Well seat (2) is a ring-type, and the cage of reinforcement of well seat is by 12-20 spaced apart

U stirrup u (7) reaches some steel hoops (8) formation with described stirrup colligation, and the well seat outside also can be provided with two well seat suspension hooks (9).The well seat also adopts concrete pouring technology to make, by with the mould of the corresponding specification of well seat, use concrete C ₃₀Cast is made.

Advantage of the present utility model is as follows:

Well lid, well seat adopt reinforced concrete structure, and its entity is take concrete as main, and the casting iron well lid of weight ratio same specification reduces about 30%, save iron and steel more than 80%, and cost is low, and the thief robber goes profitless, is difficult for losing.

Its base entity strengthens than traditional cast iron products appropriateness, combines with the road surface firmly to be difficult for being passed by vehicle.Well lid is circular turtle shell formula structure, and supporting capacity is big, and is anti-wear strong, the security performance height.

Sample of the present utility model is through the test of civil engineering inspection center of Institutes Of Technology Of Taiyuan, and test report is as follows:

1, test standard

By national highest standard, design load is 20 grades of loaded vehicle rear axle gravity 7 of automobile-surpass ^T, land width and length are 0.6 * 0.2M (twin tires impression), the standard of employing is road bridge letter design general specification JTJ021-85.Twin tires maximum load pressure is 12.74 ^T, then the single tire maximum pressure is 6.37 ^T

2, sample

Inspect three by ready samples.Make by The Small Well valley, Taiyuan City precast member factory.

Concrete design strength grade well seat C ₃₀, well lid C ₅₀

3, July 27 1999 date of test

4, test method

Producing the Amsler jack by Switzerland loads.Loading on well lid center bearing plate is 200 * 300mm, and the single tire impression loads.

5, assay (seeing Table 1)

Table 1

The test specimen numbering	Well lid diameter (mm)	Rupture load (T)	Make the date
The test specimen numbering	Well lid diameter (mm)	Rupture load (T)	Make the date	1 ^*	660	Be not added to 16 bad	On June 10th, 1999
2 ^*	660	19．5	On June 12nd, 1999	1 ^*	660	Be not added to 16 bad	On June 10th, 1999
2 ^*	660	19．5	On June 12nd, 1999	3 ^*	660	18．5	On June 7th, 1999

More than three samples all greater than single tire maximum pressure 6.37 ^T

Claims

1, a kind of steel bar concrete well lid, well seat comprise: well lid, well seat is characterized in that: the rounded turtle shell shape of described well lid (1), and the steel mesh reinforcement (5) of band suspension hook (4) is positioned at the bottom of well lid entity, and well lid (1) periphery is provided with edge plate (6); Described well seat (2) is a ring-type, and its cross section is Shape, the skeleton of well seat (2) is by spaced apart some

2, steel bar concrete well lid according to claim 1, well seat is characterized in that: the periphery of described round turtle shell shape well lid (1) is thicker, from periphery to center attenuation gradually.

3, steel bar concrete well lid according to claim 1, well seat is characterized in that: the skeleton of described well seat (2) contains 12-20

U stirrup u (7).

4, steel bar concrete well lid according to claim 1, well seat is characterized in that: the arranged outside of described well seat (2) has the well seat suspension hook (9) that links to each other with its skeleton.